Udell previously used the traditional manual approach to make its removable partial denture frames (RPD). Using the impression taken by a dentist of the patient’s mouth, a skilled technician pours up the stone model and then duplicates it into a refractory model that will become part of the mold used to cast the metal RPD framework. The technician designs a wax pattern to the refractory model that will define the geometry of the RPD and ll in undercuts in the gums to provide a smooth path for putting on and removing the RPDs.